//! 调度器模块
//! 
//! 实现智能调度算法和资源分配

use crate::{Result, Error};
use crate::types::{SchedulingRequest, SchedulingResult, SchedulingStrategy};

/// 调度器
pub struct Scheduler {
    /// 调度策略
    strategy: SchedulingStrategy,
}

impl Scheduler {
    /// 创建调度器
    pub fn new(strategy: SchedulingStrategy) -> Self {
        Self { strategy }
    }
    
    /// 调度请求
    pub async fn schedule(&self, request: SchedulingRequest) -> Result<SchedulingResult> {
        // 临时实现
        let _ = request;
        Err(Error::scheduler_error("Scheduler not implemented yet"))
    }
    
    /// 获取当前策略
    pub fn strategy(&self) -> &SchedulingStrategy {
        &self.strategy
    }
    
    /// 更新调度策略
    pub fn set_strategy(&mut self, strategy: SchedulingStrategy) {
        self.strategy = strategy;
    }
}

impl Default for Scheduler {
    fn default() -> Self {
        Self::new(SchedulingStrategy::RoundRobin)
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::types::{SandboxSpec};
    use std::time::{Duration, Instant};
    
    #[test]
    fn test_scheduler_creation() {
        let scheduler = Scheduler::default();
        assert!(matches!(scheduler.strategy(), SchedulingStrategy::RoundRobin));
    }
    
    #[test]
    fn test_strategy_update() {
        let mut scheduler = Scheduler::default();
        scheduler.set_strategy(SchedulingStrategy::LeastUsed);
        assert!(matches!(scheduler.strategy(), SchedulingStrategy::LeastUsed));
    }
}